Detachable tire-tread.



C. B. GRAY.

DETACHABLE TIRE TREADx APPLICATION FILED JAN-24, 19M- Patented Aug. 10, 1915.

A Fig. 4 is a view similar to Fig. 3

CABLISLE B. GRAY, 0F GLOVEBSVILLE, NEW YORK.

DETACHABLE I'IRE-TEEA" Specification of Letters Eaten? l dsiiiented ring so, 1%35.

Application filed January 24, 1914. Serial it'o. 314,180.

To aZZ whom it may concern:

Be it known that I, C uLIsLn citizen of the United States, residing at Gloversville, in the county of Fulton and State of New York, have invented new and useful improvements in Detachable Tirelreads, of which the following is a specificat-ion.

This invention relates to detachable tire treads, the object of the invention being to provide a novel quick detachable non-skid tread for tires such as are now in common use on automobiles, motor trucks and the like. which detachable tread may be quiclrly applied and removed and which may be renewed in whole or in part as frequently as necessary and with a minimum amount of trouble and without the services of a skilled mechanic. By means of this invention the nonskid properties of the tire may be indefinitely maintained in perfect operative condition at a minimum expense.

lVith the above and other objects in view the invention consists in the novel construction, combination and arrangements of parts. as will hereinafter be more fully described, illustrated and claimed.

In the accompanying drawings: F gure l is perspective view of a snort section of the outer case of a pneumatictire prepared in accordance with the present invention.

B. GRAY, a

Fig. 2 is a similar view of a portion of the.

endless chain or plugs. Fig. 3 is a similar view showing the plugs applied to the tire.

showing the use or" lateral stay chains in connection with the plug restraining chains. Fig. 5 represents another embodiment of the idea. Fig. 6 is a plan view of a portion of the tread of a tire showing separate sets or rows of plugs and chains.

In carrying out the present invention, the outer case of a pneumatic tire designated at l is provided in the tread surface thereof with one or more longitudinal rows or series of sockets 2 extending only part way through the tread surface of the tire.

In connection with the sockets 2 is a. corresponding number of detachable non-skid plugs 3 preferably of rubber or analogous material, each of said plugs being provided with one or more channels l extending in a plane parallel to the diametrical line thereof and adapted to receive one or more endless chains 5 which chain or chains are adapted to slide through the channels i in the plugs so that said plugs may adjust themselves readily to the positions of the sockets 2 in the tire 1. This greatlyfacilitates the application oi the endless chain of plugs to the tire,

in Fig. 2 the channels a are shown in the form of holes extending through the plug about midway between the inner and outer surfaces thereof so as to lie in close contact with the tread surface of the tire 1. In Fig. 5, the channels 4 are shown in the form of grooves extending from the outer face of each plug 3 inwardly about halt-way through the plug, in which grooves or channels the chain or chains lie. Under both constructions, however, each plug "bears sliding relation to the restraining chain 5.

Either a single chain may be used in connection with circular series 0t plugs 3 or a plurality of chains may be so used It is also desirable to use lateral stay chains '6 adapted to extend transversely around the tire l and also around the wheel rim and telly, the said stay chains 6 being located at suitable intervals and being attached to the restraining chain or chains 5. The plugs 3 are of greater depth than the sccsets 2 so that said plugs will protrude or project beyond the tread surface of the tire 1 to obtain the non-skid a r Any desired humber of rm of plugs may be used in connc single tire to proportionately non-skid quality thereof and, cparticular shape of the plugs may from that illustrated in the drawings out departing from the principle or all ficing any of the advantages of "he invenread for ti comprisin in combination with a tire tread formed with cylindrical plug sockets, an endless series of cylindrical plugs each having one end only seated in one of said sockets and of a depth greater than the depth of said socket, whereby said plug protrudes at one end in the shape of a cylindrical knob beyond the outer face of the tread surface ofthe tire, and a'flexible plug-restraining chain relatively to which said plugs are slidable, said chain passing transversely through said plugs'between the outer and inner ends thereof and in line with the tread surface of the tire against which said chain rests.

2. A detachable non-skid tread for tires comprising in combination with a tire tread formed with cylindrical plug sockets, an endless series of cyllndrical plugs each hav ing one end only seated in one of said sockets and of a depth greater than the depth of said socket, whereby said plug protrudes at one end in the shape of a cylindrical knob beyond the outer'face of the tread surface of the tire,;a flexible plug-restraining chain relatively to which said plugs are slidable, said chain passing transversely through said plugs between the outer and inner ends thereof, and lateral tire-embracing stay chains attached to said restraining chain between said plugs.

3; A detachablenon-skid tread for tires comprising in combination with a tire tread formed with cylindrical plug sockets, an endless series of cylindrical plugs each having onev end only seated in one of said sockets and of a depth greater than the depth of said socket, whereby said plug protrudes at one end in the shape of a cylindrical knob beyond the outer face of the tread surfacev 

